I don’t know about using marzipan and fondant together. I usually use buttercream and top with fondant. As to royal icing: You certainly do not have to cover the whole cake in royal icing. Just use on the parts that you want to look like snow. Also, I’ve never heard of mixing royal icing with glycerine. What is that supposed to do?? You can certainly use royal icing on its own to give a snow effect. I’d be interested to know from anyone who knows what the addition of glycerine to RI is supposed to do.
The Garden Baker
